Happens to me a lot when training in racing simulators and irl too. On simulators it's incredible, I can put top laps one after another even with a controller which is far more restrictive and imprecise compared to a wheel.
In real life though, it's like you process EVERY input at once and in full clarity, you dont even need the onboard telemetry (stopwatch, rpm, etc) You just know and feel how fast you're going. For sure you need telemetry ater that to analyse, but yeah its incredible, I remember the first times this happened to me, making really quick laps, usually after an hour or so I went back and thought "How the hell did I do this?"
Now the hard part is staying in the "zone" when you realize you're in it. Quite often a random thought pops in like "Yea!!! im in the zone" And after that it's like im instantly out of it, but im getting the hand of it though. I noticed if this doesn't happen if the annoying thought doesn't appears, very similar to the first times of getting into light or deep trance states and hesitating the moment you reach it.
Void meditation has helped me a lot on this regard. Also train/try to get into deep trance regularly, it will really help to get in this state.